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(ModeL) 2 Sheets-Sheet 1.

11.. LEMMON.

COMBINATION LOOK.

No. 280,488. Patented July 8, 1883.

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H. LEMMON.- COMBINATION LOCK.

No. 280,488; I Patented July 3, 1883.

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UNITED STATES;

PATENT FFICE.

HENRY LEMMON, OF GUELPH, ONTARIO, CANADA.

COMBINATION-LOCK.

SPECIFICATION forming part of Letters Patent No. 280,488, dated July 3, 1883,

Application filed April 10, 1852. (Model) To all whom it may concern:

Be it known that I, HENRY LEMMON, of the city of Guelph, in the county of 'Wellington, in the Province of Ontario, Dominion of Canada, watch-maker, have invented certain new and useful Attachments to Safe Combination- Locks; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same.

The great objection to safe combination-locks as at present used is that they can easily be opened, as has been done very successfully of late. For instance,the dial andlock are directly connected together by a spindle or shaft, which passes from the dial through the lock, which is opened by turning the said dial according as it is set. Burglars have opened safe-locks by driving in the spindle of the dial or pulling it out, then tapping the lock, and the bolt of the lock would fall out and the safe be easily opened.

My invention relates to certain devices used with combination-locks in such a manner that safes are more secure and cannot be opened or tampered with.

The first part of my invention consists in removing the lock from the dial-spindle, placing a gear-wheel on the inner end of the said spindle, another one of similar size on the shaft of the operating mechanism of the lock, and an illthat cause them to operate automatically, the

object of the said automatic stop-plate being to act as a safety-guard to the lock in the event of the lock being tampered with. If the lock is broken by a burglar, the safe-door cannot'be;

opened.

' By reference to the drawings forming part of this. specification, Figure 1 is a plan view of a safe-door, showing the bolts thrown or locked. Fig. 2 is a side view of the same.

spindle a distance from it.

Fig. 3 is a plan view, showing the same unlocked and bolts drawn back. Fig. 4 is a plan of the safe-door similar to Fig. 1, only it shows the automatic mechanism on the under side of the safety-plate and safe locked. Fig. 5 is a similar view to Fig. 3, showing the same automatic mechanism on the v under side of the safety-plate and safe unlocked. front elevation of the lock. Figs. 7 and 8 are enlarged views of the automatic mechanism.

A represents the outlines of a combination lock affixed to the inside of a safe-door, A.

b is the bolt of the lock, the front edge of which is seen at Figs. 1, 2, 4, and 8, and when it is in that position the door is locked.

B, Fig. 2, is the dial, numbered on the outside face in the usual manner common to such locks.

- B is the dial-spindle, passing from the registerto the inside of the door A, and terminating in-a cog-wheel, a, keyed to it, as shown more clearly at Fig. 2. c is a similar cogwheel, keyed to the outer end of the spindle, which projects from the operating mechanism of the lock, and 011 aplane with the gear-wheel a; and b is an intermediate gear-wheel, of the same size and kind as the others, affixed halfway between the two first named, on a spindle, 6, attached to the inner side of the safe-door, as shown at Fig. 2. The said wheels all mesh into each other, are operated by the handle of dial B, and are for the purpose of effecting communication between the dial B and lock Fig. 6 is a' A when the lock is removed from the said The removal of the look from the dial-spindle is to preserve the lock intact should the register-spindle be driven in or pulled out by a burglar in attempting to force the lock to open the safe. I have shown gear-wheels meshing into each other to form this connection between the dial and.

bolts 0 C. It is of different widths. Its small end 2 is made to enter the lock when it is open, and impinge on the bolt 1) of the look A when it is closed or locked. The spindle g of the handle it passes through the said plate D, going through a slot, L, cut in the said plate. Said slot allows the plateD to be pushed back and forth in opening and closing the safe-door.

It will be observed that when the bolt b of the lock is down or looked, as in Fig. 1, where it shows the end of it, the end of the plate D cannot be pushed back into the lock. Consequently the bolts 0 cannot come back, as they are secured to the plate, and the said Figs. 1 and 2 show the position of all the parts when the safe is locked. lVhen the safe-door is locked, I do not wish the handle h to be used as a means of force by a bin'glar against the look by using powerful instruments on the handle to press against the bolt 1) of the lock. Consequently I construct automatic mechanism under the said plate D, which is operated by the bolt b of the lock. \Vhen it closes or is locked, the handle-spindle g is disengaged from the plate D and turns loosely in the door. The means by which this is accomplished is seen at Figs. 4 and 5, and it will be observed that I have reversed the plate D, or turned its under side outward in both of sai d figures to show the parts more plainly.

Reference to Fig. 1 shows a ratchet-wheel, K, 011 the spindle g of the handle h on the top of the plate D. A pawl, 1', is pivoted to the said plate D to engage with the said ratchetwheel at the proper time to throw back the plate D and bolts 0, as will be more fully ex plained hereinafter. A small spring, j, is secured at one end to the bolt-frame 0. Its for ward end comes in contact with the pawl t, and it is for the purpose of throwing the pawl off the wheel when it is not required there.

On the under side of the plate D, immedi ately under the said ratchet K, is a similar ratchet-wheel, E, keyed on the spindle g, and a pawl, H, secured a short distance from it, to engage with it. Fig. 4 shows it disengaged with the ratchet when the bolts are locked and the handle h turns loosely, and Fig. 5 shows the same pawl engaged with the said ratchetwheel when the safe is unlocked. The means of automatically operating this said pawl H is as follows: One end of a connecting-rod, I, is attached to it, Figs. 4, 5, and 7, which rod passes obliquely down between two small pulleys, k I, attached in boxes to the plate D, and terminates in a small friction-wheel, m, at its opposite end, which impinges 011 the flat slanting end of a swiveled dog, J, which is loosely pivoted to the rear or small part, 2, of the plate D. (See Fig. 4.) The lower end of the said connecting-rod I is screw-threaded, and has a socket,a, screwed on it, so that the said rod can be nicely adjusted by being lengthened or shortened, in order to have the proper length to be operated upon by the dog J and throw the pawl on or off the ratchet-wheel .E.

It will be observed that the operation of the above parts are as follows: \Vhen the safe is locked, for instance, thebolt b of thelock presses against the outer end of the dog J -the fiat slanting portion 0 of which impinges against the friction-wheel m of the connecting-rod I and pushes the pawl H on" the ratchet-wheel E, so that the spindle g and both ratchet-wheels will turn loosely with the movement of the handle h and not operate or move the plate D, to which the locking-bolts are afiixed.

\Vhen the safe is unlocked, by turning the dial B to the set numbers the bolt 1) of the look A is withdrawn or rolls back, the part 0 of the dog J, being heavier than the other half of it, drops a little and allows the pawl H to fall against and engage with the teeth of the ratchet-wheel, as shown at Fig. 5, when by turning the handle backward the end of the plate I) enters the open bolt-hole of the lock and allows the locking-bolts O O to be withdrawn and the safe-door to open.

By reference to Fig. 3 it will be seen that when the rear end of the plate D enters the look A and the safe is open the top pawl, 'i, is released from the spring j and falls into and engages with the top ratchet-wheel, K. In order, then, to lock the door of the safe, by turning the handle it to the left the plate D can be moved back again, and with it the locking-bolts C 0 shot in their places. The dial is turned, and the bolt 1) of the combination-lock falls and closes the bolt-opening opposite the rear end, 2, of the plate I). The falling of the said bolt 1) against the dog J releases the pawl. H from the under ratchet-wheel, and the spring j on the upper side of the plate D comes in contact with the upper pawl, i, and releases it from the upper ratchet-wheel, K, and thus allows the spindle g of the handle it to turn loosely and not interfere with the other parts.

NVhen the safe is locked, it will be found impossible to open it, except by turning the dial to the proper combination of figures to which the lock has been set.

Having thus described my device, what I claim as my invention is- 1. In combination with the look A and plate D, the mechanism to operate the plate D and locking-bolts O O, consisting of the ratchetwheel K on the spindle g, pawl i, and spring j on the upper part of the plate D, substantially as and for the purpose specified.

2. The combination, with the lock Aand plate D, of the ratchet-wheel E, pawl H, connectingrod I, pulleys k 7, friction-wheel 0, and dog J, substantially as and for the purpose specified.

3. In a permutation-lock, the combination, withthe pawl H and dog J, of the rod I and screw-socket 11, containing the friction-wheel m, 1to adjust the length of said red, as specifier Guelph, Ontario, Canada, March 7, 1882.

HENRY LEMMON.

In presence of Joint HU'rroN, WILLIAM FARRA R. 

